Peugeot 308 Secret Menu [hot] Jun 2026

The is a built-in diagnostic and developer mode hidden within the car’s touchscreen infotainment system. Often referred to by enthusiasts as the "Expert Menu" or "Engineering Mode," this interface bypasses the standard layout to grant owners and technicians access to live telemetry, raw GPS signals, exact system hardware logs, and a command line interface for "cheat codes". Whether your vehicle runs the older SMEG/SMEG+ hardware from early generation T9 models or the modern NAC (Navigation Advanced Connectivity) infotainment architecture, unlocking this menu is entirely possible using a series of specific button-press combinations.

for about 5 to 10 seconds.

Useful for troubleshooting issues with Android Auto or Apple CarPlay . Important Warning peugeot 308 secret menu

so the infotainment screen is fully booted up. The is a built-in diagnostic and developer mode

Modifying internal parameters or altering the CAN-bus settings can cause your screen to turn off permanently (bricking the unit). for about 5 to 10 seconds

Next time your Bluetooth acts up, or you simply want to check if your car's software is running the latest build, skip the trip to the mechanic and use these simple button holds to unlock the hidden side of your Peugeot 308.

Monitor the temperature of the head unit to diagnose screen flickering or crashes.